Alert archive / Illinois / Flash Flood Warnings in 2009
Flash Flood Warning 29, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at May 27, 2009, 8:03 PM CDT for Bond County, Madison County, Saint Clair County, Illinois; Saint Louis County, City of Saint Louis, Missouri. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 27, 2009, 8:03 PM CDT (01:03 UTC)
- Expired
- May 28, 2009, 12:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bond County, IL, Madison County, IL, Saint Clair County, IL, City of Saint Louis, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 45 km from the middle of the area, began a volume at 01:03 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 1.1 hours before the alert went out and 207 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 31 J/kg
- Mixed-layer CIN
- -139 J/kg
- Mixed-layer LCL
- 727 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS53 KLSX 280103
FFWLSX
ILC005-119-163-MOC189-510-280500-
/O.NEW.KLSX.FF.W.0029.090528T0103Z-090528T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
803 PM CDT WED MAY 27 2009
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EASTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI
MADISON COUNTY IN SOUTHWEST ILLINOIS
NORTHWESTERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS
ST. LOUIS CITY IN EAST CENTRAL MISSOURI
WESTERN BOND COUNTY IN SOUTH CENTRAL ILLINOIS
* UNTIL MIDNIGHT CDT
* AT 755 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA...WITH ESTIMATES OF TWO TO THREE INCHES AND GROUND
TRUTH OF NUMEROUS SMALL CREEKS OUT OF THEIR BANKS.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
AFFTON...BEL-RIDGE...BELLEFONTAINE NEIGHBORS...BERKELEY...BLACK
JACK...BRENTWOOD...BRIDGETON...CAHOKIA...CASEYVILLE...CLAYTON...
COLLINSVILLE...COOL VALLEY...CRESTWOOD...CREVE COEUR...DELLWOOD...
DES PERES...EAST ST. LOUIS...EDWARDSVILLE...FERGUSON...
FLORISSANT...FRONTENAC...GLEN CARBON...GLENDALE...GRANITE CITY...
HAZELWOOD...HILLSDALE...JENNINGS...KINLOCH...KIRKWOOD AND LADUE.
THIS IS AN UPGRADE TO THE ADVISORY THAT WAS IN EFFECT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ADDITIONAL RAINFALL AMOUNTS OF ONE INCH ARE POSSIBLE IN THE WARNED
AREA.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.
A FLASH FLOOD WARNING WARNING MEANS THAT FLOODING IS IMMINENT OR
OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND
IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO
CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST
LOUIS.
&&
LAT...LON 3846 9039 3847 9042 3849 9041 3850 9044
3877 9048 3884 9023 3882 9020 3883 9015
3880 9012 3883 9011 3887 9015 3900 8972
3899 8970 3885 8955
$$
TES1 follow-up statement
000
WGUS73 KLSX 280252
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
952 PM CDT WED MAY 27 2009
ILC005-119-163-MOC189-510-280500-
/O.CON.KLSX.FF.W.0029.000000T0000Z-090528T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ST. CLAIR IL-MADISON IL-BOND IL-ST. LOUIS CITY MO-ST. LOUIS MO-
952 PM CDT WED MAY 27 2009
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EASTERN ST. LOUIS...ST.
LOUIS CITY...WESTERN BOND...MADISON AND NORTHWESTERN ST. CLAIR
COUNTIES UNTIL MIDNIGHT CDT...
AT 942 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT HEAVY RAIN PRODUCING THUNDERSTORMS HAD MOVED ACROSS THE AREA
AND DROPPED BETWEEN ONE AND THREE INCHES OF RAINFALL IN LOCALIZED
AREAS...THROUGH ALHAMBRA...EDWARDSVILLE...GRANITE CITY...UNIVERISITY
CITY AND MARYLAND HEIGHTS.
RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
AFFTON...BEL-RIDGE...BELLEFONTAINE NEIGHBORS...BERKELEY...BLACK
JACK...BRENTWOOD...BRIDGETON...CAHOKIA...CASEYVILLE...CLAYTON...COLLI
NSVILLE...COOL VALLEY...CRESTWOOD...CREVE COEUR...DELLWOOD...DES
PERES...EAST ST. LOUIS...EDWARDSVILLE...FERGUSON...FLORISSANT...
FRONTENAC...GLEN CARBON...GLENDALE...GRANITE CITY...HAZELWOOD...
HILLSDALE...JENNINGS...KINLOCH...KIRKWOOD AND LADUE.
NUMEROUS CREEKS HAVE BEEN REPORTED OUT OF THEIR BANKS ACROSS THE
WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR
OCCURRING. IF YOU ARE IN THE WARNING AREA...MOVE TO HIGHER GROUND
IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO
CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY SO THAT THEY
MAY TAKE APPROPRIATE ACTION TO CLOSE FLOODED ROADWAYS. THEY WILL
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST LOUIS.
&&
LAT...LON 3846 9039 3847 9042 3849 9041 3850 9044
3877 9048 3884 9023 3882 9020 3883 9015
3880 9012 3883 9011 3887 9015 3900 8972
3899 8970 3885 8955
$$
TESThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 7:28 PM CDT | Areal Flood Advisory | LSX | Bond, Madison, Saint Clair | 4 hr |
| May 27, 11:43 PM CDT | Areal Flood Warning | LSX | Bond, Clinton, Fayette, Marion | 8 hr |
| May 27, 11:57 PM CDT | Areal Flood Warning | LSX | Bond, Clinton, Madison, Saint Clair | 8 hr |
Nearby
Flash Flood Warnings in Illinois, 2009Flash Flood Warnings in Missouri, 2009Every flash flood warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.